Team Peeta

In my opininon Katniss should choose Peeta for a relationship, because he really cares about her.

He even risked his life for her and saved her life a couple of times. 

She likes him very much, you can see that at the part when they were in the arena and hadn't to pretend their relationship anymore, she even kissed him.

Peeta is very kind and he has a very good trained body for someone who lives in District 12.

Katniss future would be easier to handle, because he can bake bread and isn't that poor.